Ok came back from my little trip. Total miles 342.5. The radio display reads 30.1 mpg. I calculated 28.1 mpg. There is a little discrepancy, could be the method I use, but even a worst case average of 28 mpg is great.
The trip was about 70% highway (60-70 mph), 30% local (30-45 mph, lots of traffic lights, hills, no bumper to bumper traffic).
I was also using a fuel system cleaner during this trip, but I doubt that had an effect on the mpg.
I didn't check the tire pressure, but I usually have it at 33-34 psi. Engine oil and air filter was changed recently.